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Showing 1-28 of 28 results for "466867" within Papers
Bounphanh Tonpheng et al.
Physical chemistry chemical physics : PCCP, 13(33), 15047-15054 (2011-07-22)
The thermal conductivity κ, heat capacity per unit volume ρc(p) and glass transition behaviour under pressure have been established for medium and high vinyl content polybutadiene PB with molecular weights 2600 and 100,000 and their highly cross-linked (ebonite) states obtained
Li Li et al.
ACS nano, 5(10), 7754-7766 (2011-08-27)
Understanding the relevant permeability properties of ultrafiltration membranes is facilitated by using materials and procedures that allow a high degree of control on morphology and chemical composition. Here we present the first study on diffusion permeability through gyroid nanoporous cross-linked
Ashley L Black Ramirez et al.
Nature chemistry, 5(9), 757-761 (2013-08-24)
High shear stresses are known to trigger destructive bond-scission reactions in polymers. Recent work has shown that the same shear forces can be used to accelerate non-destructive reactions in mechanophores along polymer backbones, and it is demonstrated here that such
Thomas Lunkenbein et al.
Journal of the American Chemical Society, 134(30), 12685-12692 (2012-07-05)
Nanostructured inverse hexagonal polyoxometalate composite films were cast directly from solution using poly(butadiene-block-2-(dimethylamino)ethyl methacrylate) (PB-b-PDMAEMA) diblock copolymers as structure directing agents for phosphomolybdic acid (H(3)[PMo(12)O(40)], H(3)PMo). H(3)PMo units are selectively incorporated into the PDMAEMA domains due to electrostatic interactions between
Zhi-ping Huang et al.
Journal of hazardous materials, 229-230, 251-257 (2012-06-26)
Migration appeared in the interfaces of nitrate ester plasticized polyether (NEPE) based propellant/hydroxyl-terminated polybutadiene (HTPB) based liner/ethylene propylene terpolymer (EPDM) based insulation was studied by aging at different temperatures. The migration components were extracted with solvent and determined by high
Rachel Calvet et al.
Journal of chromatography. A, 1253, 164-170 (2012-07-24)
In this study, the coupling of IGC-ID analysis and carbon blacks impregnation with increasing ratios of polymer allow us to highlight the affinity of the polymer to the solid surface. The variations of the dispersive component of the surface energy
Gregory P Robbins et al.
Langmuir : the ACS journal of surfaces and colloids, 26(17), 14089-14096 (2010-08-14)
The polymersome, a fully synthetic cell mimetic, is a tunable platform for drug delivery vehicles to detect and treat disease (theranostics). Here, we design a leuko-polymersome, a polymersome with the adhesive properties of leukocytes, which can effectively bind to inflammatory
Felix H Schacher et al.
Nanoscale, 3(1), 288-297 (2010-11-10)
We present a detailed study on the preparation of compartmentalized cylindrical nanoparticles via a templated approach: the polybutadiene part of a linear polybutadiene-block-poly(2-vinyl pyridine)-block-poly(tert-butyl methacrylate) block terpolymer, B420V280T790, having a bulk microstructure with PB cylinders covered by a P2VP double
Anton Berthold et al.
Macromolecular rapid communications, 32(16), 1259-1263 (2011-06-22)
We present an efficient method for functionalizing the large polymer-air interface of a gyroid nanoporous polymer. The hydrophilicity of nanoporous cross-linked 1,2-polybutadiene is tuned by thiol-ene photo-grafting of mercaptosuccinic acid or sodium 2-mercaptoethanesulfonate. The reaction is monitored by FT-IR, UV-Vis
Joan M Widin et al.
Journal of the American Chemical Society, 134(8), 3834-3844 (2012-01-28)
Controlled/"living" polymerizations and tandem polymerization methodologies offer enticing opportunities to enchain a wide variety of monomers into new, functional block copolymer materials with unusual physical properties. However, the use of these synthetic methods often introduces nontrivial molecular weight polydispersities, a
Nimi Gopalakrishnan et al.
Optics letters, 36(17), 3350-3352 (2011-09-03)
We demonstrate and describe how nanoporous liquid core waveguides can exclude scattering particles, making them an ideal integrated platform for analysis of turbid solutions. Milk with 0.5% fat showed an optical propagation loss of 0.05 dB/mm at 633 nm in nanoporous waveguides
P S Brown et al.
Langmuir : the ACS journal of surfaces and colloids, 28(38), 13712-13719 (2012-09-13)
Two-dimensional hexagonally ordered honeycomb surfaces have been created by solvent casting polybutadiene films under controlled humidity. Subsequent CF(4) plasmachemical fluorination introduces cross-linking and surface texturing, leading to hierarchical surfaces with roughness on both the 10 μm (honeycomb) and micrometer (texturing)
Zhiliang Cheng et al.
Bioconjugate chemistry, 22(10), 2021-2029 (2011-09-09)
Block copolymer-based vesicles have recently garnered a great deal of interest as nanoplatforms for drug delivery and molecular imaging applications due to their unique structural properties. These nanovesicles have been shown to direct their cargo to disease sites either through
Mechanochemistry: Demonstrated leverage.
Roman Boulatov
Nature chemistry, 5(2), 84-86 (2013-01-25)
Maria Hitrik et al.
Langmuir : the ACS journal of surfaces and colloids, 27(19), 11889-11898 (2011-08-26)
The essence of this study is to apply the Langmuir-Blodgett (LB) technique for assembling asymmetric membranes. Accordingly, Langmuir films of a (further) polymerizable polymer, 1,2-polybutadiene (1,2-pbd), were studied and transferred onto different solid supports, such as gold, indium tin oxide
Bobby Pejcic et al.
Talanta, 85(3), 1648-1657 (2011-08-03)
This report compares the performance of polymer and carbon nanotube-polymer composite membranes on a quartz crystal microbalance (QCM) sensor for the detection of aromatic hydrocarbons (benzene, toluene, ethylbenzene, p-xylene and naphthalene) in aqueous solutions. Several different polymers (polystyrene, polystyrene-co-butadiene, polyisobutylene
I Y Lyubimov et al.
The Journal of chemical physics, 138(12), 12A546-12A546 (2013-04-06)
The theory to reconstruct the atomistic-level chain diffusion from the accelerated dynamics that is measured in mesoscale simulations of the coarse-grained system, is applied here to the dynamics of cis-1,4-polybutadiene melts where each chain is described as a soft interacting
Alexandra Sperschneider et al.
ACS nano, 4(10), 5609-5616 (2010-09-17)
We report on the quasi in situ scanning force microscopy nanotomography which proved to be a key method to effectively obtain a three-dimensional (3D) microdomain structure of a complex ABC triblock morphology. As an example, we studied polybutadiene-block-poly(2-vinyl pyridine)-block-poly(tert-butyl methacrylate)
Mohammad Ebrahim Olya et al.
Chemosphere, 91(7), 935-940 (2013-03-15)
This paper reports an investigation into the effect of a number of operating factors on the removal of Acid Blue 92 (AB92) from an aqueous solution using hydroxyl-terminated polybutadiene (HTPB) as an adsorbent. The optimum values of adsorbent dose and
Dong Wu et al.
Journal of the American Chemical Society, 132(45), 15936-15938 (2010-10-28)
Single-molecule force spectroscopy is used to observe the irreversible extension of a gem-dibromocyclopropane (gDBC)-functionalized polybutadiene under tension, a process akin to polymer necking at a single-molecule level. The extension of close to 28% in the contour length of the polymer
Deniz Turgut et al.
PloS one, 5(12), e15551-e15551 (2010-12-24)
In recent years, there is aroused interest in expressing complex systems as networks of interacting nodes. Using descriptors from graph theory, it has been possible to classify many diverse systems derived from social and physical sciences alike. In particular, folded
Jiayin Yuan et al.
Macromolecular rapid communications, 32(15), 1157-1162 (2011-06-29)
Commercially available 1,2-PB was transformed into a well-defined reactive intermediate by quantitative bromination. The brominated polymer was used as a polyfunctional macroinitiator for the cationic ring-opening polymerization of 2-ethyl-2-oxazoline to yield a water-soluble brush polymer. Nucleophilic substitution of bromide by
Aleer M Yol et al.
Journal of the American Society for Mass Spectrometry, 24(1), 74-82 (2012-11-30)
[M + Ag](+) ions from cyclic and linear polystyrenes and polybutadienes, formed by matrix-assisted laser desorption ionization (MALDI), give rise to significantly different fragmentation patterns in tandem mass spectrometry (MS(2)) experiments. In both cases, fragmentation starts with homolytic cleavage at
Hiroshi Yabu
Chemical communications (Cambridge, England), 47(4), 1196-1197 (2010-11-27)
Blue light-emitting Au nanoclusters were synthesized in a simple one-pot process via reflux of Au ions with amino-terminated poly(1,2-butadiene) in toluene. DLS results and photoemission spectra showed that Au(8) nanoclusters were successfully formed. Moreover, photo-patterned films containing Au(8) clusters were
Hope M Klukovich et al.
Nature chemistry, 5(2), 110-114 (2013-01-25)
Mechanical forces along a polymer backbone can be used to bring about remarkable reactivity in embedded mechanically active functional groups, but little attention has been paid to how a given polymer backbone delivers that force to the reactant. Here, single-molecule
Diego A Pantano et al.
The journal of physical chemistry. B, 115(16), 4689-4695 (2011-04-06)
We present the results of coarse grained molecular dynamics simulation using a charge free model that is able to capture different regions of the morphological phase diagram of charged diblock copolymers. Specifically, we were able to reproduce many phases of
Yohan van de Looij et al.
NMR in biomedicine, 25(1), 93-103 (2011-05-28)
Diffusion tensor imaging (DTI) was used to study traumatic brain injury. The impact-acceleration trauma model was used in rats. Here, in addition to diffusivities (mean, axial and radial), fractional anisotropy (FA) was used, in particular, as a parameter to characterize
Ho-Joong Kim et al.
Journal of nanoscience and nanotechnology, 13(1), 577-581 (2013-05-08)
Thermal and mechanical properties of PU/POSS nanocomposites plasticized with DOA were investigated. These hybrid materials were prepared using one-step method through the incorporation of flexible HTPB prepolymer, reactive or non-reactive POSS nanoparticle, and DOA plasticizer under IPDI curative system. The
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